ShyTorque,
Good point. We need to modify one of these for inverted flight, so we can get closer to the ground. We can hand-launch and hand recover. Or just use my 4-year old's technique of chopping the collective wherever and letting gravity take over.
I still think CE will be more effective than GE, because I think it will be easier to eject air out in ground effect vs. pulling air in by the ceiling. Spanwise flow is going to want to go out.
-- IFMU